Chapter 6. Troubleshooting and Support

Troubleshooting Guide

Table 6.1. 
Problem Reason Solution
The main power LED is dark The power switch is OFF Turn on the power switch
No power source is connected to STK600 Do one of the following:
  • Connect a USB cable between STK600 and a PC. Make sure the PC is turned on.

  • Connect a DC power cable to STK600. Note: The DC-jack must have a center pin with positive polarity.

The preprogrammed example code does not toggle the LEDS There is no AVR device in the socket Plug the AVR device into the right socket (see ISP Programming and Parallel High Voltage Programming).
The LEDS are not connected to the I/O ports Connect the LEDS header to the PORTD header, and SWITCHES header to PORTB header (see LEDs and Switches).
No target voltage Ensure that the VTG jumper is mounted and that VTG is set above 1.8V from AVRStudio
The flash memory is erased Reprogram the AVR device
The AVR device can not be programmed using SPI. The AVR device is inserted with wrong orientation Check that the notch on the AVR socket matches the notch on the AVR device.
The ISP/PDI headers are not connected Connect the 6-pin flexible cable between the two 6-pin ISP/PDI headers.
The VTARGET voltage is too low Check the AVR datasheet for minimum operating voltage
The memory lock bits are programmed Erase the memory before programming
The SPI enable fuse is un-programmed Program the SPIEN fuse using Parallel High Voltage Programming or Serial High Voltage Programming
Reset disable fuse is set. Check reset disable fuse.
SPI frequency is too high. Check STK600 SPI frequency and make sure it is lower than target clock divided by 4.
CKDIV fuse is set Reduce ISP programming speed
External pullup resistor on reset line too low. Ensure that external pullup resistor is ≥4.7kOhm.
AREF0 jumper mounted For some devices the AREF0 is connected to a pin used for the ISP interface. The AREF0 jumper must therefore be removed to do serial programming of these devices. See the ISP Programming section for which routingcards this applies.
The AVR device can not be programmed using JTAG. The VTARGET voltage is too low Check the AVR datasheet for minimum operating voltage
The JTAG headers are not connected Connect the 10-pin flexible cable between the two 10-pin JTAG headers. See JTAG Programming.
The JTAG enable fuse is un-programmed Program the JTAGEN fuse using Parallel High Voltage Programming or Serial High Voltage Programming
The memory lock bits are programmed Erase the memory before programming
The AVR device can not be programmed using high-voltage programming. The VTARGET voltage is too low Ensure that the voltage is at least 4.5V.
The high-voltage programming headers are not connected Mount cables between the programming headers. See Parallel High Voltage Programming or Serial High Voltage Programming
The reset jumper is not mounted Mount the reset jumper
The I/O ports are connected to peripheral circuitry (leds, switches, etc.) Remove all peripheral connections from the I/O ports belonging to the high-voltage programming interface.
The memory lock bits are programmed Erase the memory before programming
AREF0 jumper mounted For some devices the AREF0 is connected to a pin used for the parallel programming interface. The AREF0 jumper must therefore be removed to do parallel programming of these devices. See the Parallel High Voltage Programming section for which routingcards this applies.
AVR studio can not connect to STK600 USB cable is not connected, or power is off Connect USB cable
Firmware is in an hang-up state Toggle power on STK600.
The status LED is blinking orange Wrong combination of routing and socketcard, or card removed when the kits is powered. Check the device support file for routing and socketcard combination. Allways turn of kit power before removing or mounting routing and socketcards.
The status LED is blinking orange The mounted cards is not recognized by STK600. The routing and socketcard identification table in STK600 must be upgraded. Start AVRStudio and connect to kit using programming dialog. This will initiate a silent upgrade of the routing and socketcard table in the STK600 controller.T
The status LED is blinking red with low frequency Short circuit on VTarget or AREF Resolve the short circuit.
The status LED is blinking red with high frequency To much current drawn from supply If the kit is powered from USB, try connecting a external power to the DC jack.
The LEDs don't work (running from external VTarget.) STK600 must be powered for LEDs to work. Supply power to STK600 and turn it on.